Watercolor painting of Royal Naval Air Service servicemen and North Sea-class airship NS-3 in a hangar, RNAS Longside, Scotland, circa 1917. Inscription on verso: "Sketch of No. 20."
Watercolor sketch of a tethered balloon, circa 1917-1918. Pencil lines depict how the balloon is tied and anchored to the ground. Reverse includes numerous ink sketches.